DAYTONA BEACH -- A 28-year-old Daytona Beach man who was shot while riding his bicycling Sunday morning died later in the day, police said.

"This is now a homicide," Police Chief Mike Chitwood said at 5 p.m. "He died about a half hour ago.

Joseph A. Ruffing was shot on Forest Glen Boulevard about a block away from where he lived in the Nova Glen Apartments, according to a report.

Police arrived at 5:37 a.m. when a resident called about "a person laying on the ground," a police report states. The man heard a single gunshot and saw Ruffing, who had not yet been identified, face down and his bicycle a short distance away.

"He ran back to get his cellphone and then went over to see if he could render aid while talking to the victim," according to the report. "He received no response."

Ruffing was shot once, the report states, and had entry and exit wounds in his stomach and back.

"It appears he was shot while riding his bicycle and either fell or jumped off," according to the report. "(He) tried to flee on foot, as he was about 30 feet away from the bicycle."

Investigators are trying to determine if Ruffing knew his assailant, or whether the shooting was random.

"We are trying to establish a timeline," Chitwood said a short time before he died. "He works at the Olive Garden on (International Speedway Boulevard). His mother said he rides his bike everywhere."

Ruffing has had run-ins in the past with police, but has not been arrested since 2007.

Editors note: Joseph Ruffing's age was incorrect in an earlier version of this story.